Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 390 · 40 questions

What you do (Dry out, crystals in): 1. An adult pours warm water into a cup. 2. Stir in salt, a spoon at a time, until no more dissolves. 3. Pour the salty water into a shallow dish and lay a string in it. 4. Leave it on a sunny windowsill, out of reach of small children, and check each day.

1. 1.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) water evaporates (d) the dish melts
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we keep it the same (c) we measure it
3. 3.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
4. 4.True or false: table salt dissolves in water. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) food colour (b) sawdust (c) cooking oil (d) small pebbles
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) a friend who is running (d) the youngest child
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the same dish (c) sunny or shady place (d) the kind of salt
8. 8.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny cubes (d) tiny triangles
9. 9.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) chalk powder (d) sawdust
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a shallow dish (d) a magnet
11. 11.🧈 Which of these is a change that can be undone? (a) baking a cake (b) folding paper (c) rusting iron (d) cooking an egg
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of salt
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
14. 14.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) a spoon (d) a balloon
15. 15.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we keep it the same (b) we change it (c) we measure it
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the kind of salt (b) the amount of salt (c) days to see crystals (d) sunny or shady place
18. 18.True or false: glucose powder does not dissolve in water. (a) True (b) False
19. 19.🧈 Which of these is a change that can be undone? (a) melting ice (b) browning lemon ink (c) baking a cake (d) cooking an egg
20. 20.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to make it fizz (d) to cool the water
23. 23.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a piece of string (d) a magnet
25. 25.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
26. 26.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
28. 28.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) table salt (d) sugar
29. 29.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) cooking oil (d) glucose powder
30. 30.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
31. 31.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) yeast (d) a spoon
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) sawdust (d) food colour
35. 35.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) sawdust (b) sand (c) table salt (d) chalk powder
38. 38.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) sugar (d) small pebbles
40. 40.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) cooking oil (d) glucose powder

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